Dan Nally ’11 and Dave Quinn ’12 did exhaustive work researching this final report for Mark Chase’s Transportation Planning class. The report presents a methodology for analyzing and prioritizing Somerville’s bicycling infrastructure needs over the next several years. It is intended to provide general recommendations for a phased approach to making physical improvements to the City of Somerville’s bicycle network based on priority zones, traffic patterns, and road dimensions. It also proposes methods to increase bicycle ridership through social marketing, education, and theft prevention strategies.